I could use help with some tuning issues I am having with my RCV 91-CD. I just can;t seem to get it tuned to my satisfaction. First, I have come to notice that when I apply inward pressure to the throttle barrel the engine smooths out nicely. Vaccuum leak? Attached is a pic to illustrate what I mean. Second, when tuning the idle needle I usually end up with it unscrewed only around 1 turn. The factory setting is 2 1/2 turns out (with throttle closed) - and it seems to me that is quite a huge difference between my seeting and factory settings. The main needle also has quite a difference, but not quite a huge as the idle needle. Can anyone tell me where their needles are at proper tuning?

Thanks for any help...

Hi, How long have you run the engine? what are your tach reading at idle and top speed. A base line to start with is having a 1/16'' opening in the carb at idle.